“We have no reserves,” Energy Minister Vicente de la O said. HAVANA, May 13 (Reuters) - Protests broke out across the Cuban capital of Havana on Wednesday evening as the city confronted its worst rolling blackouts in decades amid a U.S. blockade that has starved the island of fuel. Crowds of hundreds of angry Cubans poured onto the streets in several outlying neighborhoods, blocking roads with burning piles of rubbish, banging pots and shouting “Turn on the lights!” and “The people, united,